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UtilZilla
45 free tools that never leave your browser
UtilZilla is a growing library of 45 free tools — calculators, converters, dev tools, and AI/LLM tools (token counter, cost calculator) — that run 100% client-side. No signup, no uploads, no data collected.
Top comment
Hey PH 👋 I kept needing a quick JSON formatter, unit converter, or hash generator and landing on sites buried in ads and forced signups, so I built UtilZilla: a growing set of free tools that run entirely in your browser. Nothing you type or upload ever touches a server. 45 tools live today across calculators, converters, text tools, dev tools, and a new AI Tools category, a token counter using the real GPT tokenizer, an LLM API cost calculator, a JSON Schema validator for function-calling output, and an llms.txt generator. More going up every week based on what people ask for. Would love feedback on what's missing, what's a tool you searched for recently and couldn't find a decent free version of?
About UtilZilla on Product Hunt
“45 free tools that never leave your browser”
UtilZilla was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #98 on the daily leaderboard. UtilZilla is a growing library of 45 free tools — calculators, converters, dev tools, and AI/LLM tools (token counter, cost calculator) — that run 100% client-side. No signup, no uploads, no data collected.
On the analytics side, UtilZilla competes within Productivity and Developer Tools — topics that collectively have 1.2M followers on Product Hunt. The dashboard above tracks how UtilZilla performed against the three products that launched closest to it on the same day.
Who hunted UtilZilla?
UtilZilla was hunted by Deepak HP. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of UtilZilla including community comment highlights and product details, visit the product overview.